Agnikul Cosmos

Agnikul Cosmos Store Commerce MCP API

The agent-facing commerce surface for Cosmos Store, Agnikul's branded merchandise shop, implementing the Universal Commerce Protocol (dev.ucp.shopping) over MCP. Thirteen tools cover catalog search and lookup, product detail, cart create/update/cancel, checkout create/update/complete/cancel, and order retrieval; a second endpoint adds one policy-and-FAQ question-answering tool. Anonymous — no API key or OAuth token is required to list tools or search the catalog — but completing a checkout requires an idempotency key and contemporaneous buyer approval of payment. This sells t-shirts and mission patches, not launches.

Documentation GitHub

Documentation

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Documentation

https://shop.agnikul.in/agents.md

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Authentication

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/authentication/agnikul-authentication.yml

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RateLimits

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/rate-limits/agnikul-rate-limits.yml

Other Resources

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MCPServer

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/mcp/agnikul-mcp.yml

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ToolCrosswalk

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/mcp/agnikul-tool-crosswalk.yml

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WellKnown

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/well-known/agnikul-ucp.json

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Conventions

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/conventions/agnikul-conventions.yml

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Idempotency

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/conventions/agnikul-conventions.yml

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DataModel

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/data-model/agnikul-data-model.yml

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ErrorCatalog

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/errors/agnikul-problem-types.yml

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APIsJSON

https://raw.githubusercontent.com/api-evangelist/agnikul/refs/heads/main/apis.yml

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API entry from apis.yml

aid: agnikul:agnikul-cosmos-store-commerce-mcp-api
name: Agnikul Cosmos Store Commerce MCP API
description: The agent-facing commerce surface for Cosmos Store, Agnikul's branded merchandise shop, implementing
  the Universal Commerce Protocol (dev.ucp.shopping) over MCP. Thirteen tools cover catalog search and
  lookup, product detail, cart create/update/cancel, checkout create/update/complete/cancel, and order
  retrieval; a second endpoint adds one policy-and-FAQ question-answering tool. Anonymous — no API key
  or OAuth token is required to list tools or search the catalog — but completing a checkout requires
  an idempotency key and contemporaneous buyer approval of payment. This sells t-shirts and mission patches,
  not launches.
image: https://shop.agnikul.in/cdn/shop/files/logo.png?v=1705750282
humanURL: https://shop.agnikul.in/agents.md
baseURL: https://shop.agnikul.in/api/ucp/mcp
x-base-note: The endpoint named in the store's own agents.md and llms.txt, probed live at HTTP 200 on
  2026-09-12. The machine-readable /.well-known/ucp profile names the equivalent Shopify permanent domain
  form https://40146b.myshopify.com/api/ucp/mcp; both answer with identical tool sets.
tags:
- Commerce
- Catalog
- Cart
- Checkout
- Orders
- Agentic Commerce
properties:
- type: Documentation
  url: https://shop.agnikul.in/agents.md
- type: MCPServer
  url: mcp/agnikul-mcp.yml
- type: ToolCrosswalk
  url: mcp/agnikul-tool-crosswalk.yml
- type: WellKnown
  url: well-known/agnikul-ucp.json
- type: Authentication
  url: authentication/agnikul-authentication.yml
- type: Conventions
  url: conventions/agnikul-conventions.yml
- type: Idempotency
  url: conventions/agnikul-conventions.yml
- type: DataModel
  url: data-model/agnikul-data-model.yml
- type: ErrorCatalog
  url: errors/agnikul-problem-types.yml
- type: RateLimits
  url: rate-limits/agnikul-rate-limits.yml